Electric-light fitting or bracket.



E. R. HOUGH & L. HARRISON. ELECTRIC LIGHT FITTING 0R BRACKET.

Patented Jan. 9, 1917.

APPLICATION FILED FEB- H, I916.

KJIwyIv via/MM 7W Witnessw. 2 /'I/- W I I. 2 MJ 9 I E. R. HOUGH & L.HARRISON.

L H 9F. OH HS av Jr R dun es m m D E K- C6 l R9 l 4 m mrr T. Hm FR T HNvGm M 60 m T n- CA E IL E Z/u/advrs. KW $1M iirsoiv, or noNnoN,'EN'GLAND.

ELECTRIC-LIGHT FITTIhTG 0R BRACKET.

Application filed February 14, 1916.

To all whom z'tmay concern:

Be it known that-we, EDWIN- ROBERT, HOUGH and LAURENCE HARRISON, subectsof the King of Great Britain, and both residing at Sutherland House,3 Lloyds avenue, London, England, have invented new and usefulImprovements in Electric-Light Fittings or Brackets, of which thefollowing is a specification.

Our invention relates to electric-light fittings or brackets of the kindwherein a cap or dome carrying the lamp holder is" designedto haveinsertedinto it a ring for supporting a well-glassglobe or the like, andfrequently provided with a guard the said ring being tightened against apacking in the cap or dome to render the fitting water-tight. I

In the specification of former British patent granted to E. R. Hough,No. 2048 of 1914 an arrangement is described wherein pins on the insideofthe cap engaged with inclined surfaces on the exterior of the ring,this construction, however was objectionable in that suflicientadjustment 'of the ring within the cap to accommodate well-glasseshaving supporting flanges of varying thickness could only be obtained bymaking the ring unnecessarily deep.

According to our present invention the ring which carries the globe(with or without a guard) is only made of such depth as will give it thenecessary strength and is provided with pins or projections designed toengage with inclined slots of considerable length formed spirally on theinner surface of the cap or dome, whereby a relatively considerabledegree of movement of the said ring into the cap or dome is permitted sothat sufficient adjustment is provided for to enable well-glasses or thelike having flanges of varying thickness, being utilized in one and thesame fitting.

To enable the invention to be fully under- I stood we will describe itby reference to the accompanying drawings, in which Figure 1 is aperspective view of an electric-light fitting having our improvementsapplied thereto and shown in conjunction with a guard. Fig. 2 is aperspective view partly in section of the cap. Fig. 3 is a perspectiveview of the ring with the guard attached. Fig. 4 is a sectionalelevation of the cap illustrating a modification, and Fig.

Specification of Letters Patent.

Patented Jan. 9, 1917. Serial No. 78,247.

5 is an underside view. thereof. Fig. 1 is drawn to a smaller scale thanthe remaining figures of the. drawing.

Referring first to the construction of fitting shown in Figs; 1 to.3, aindicates the guard, b the annular end or ring thereof and c the lugs orpins which project from the periphery of the said ring 6. cates the capor dome, e the annular rim The guard a is secured to the cap or dome dby passing the ring 5 into the rim 6 in such a position that the radiallugs 0 on the former pass through the notches g and into the spiralslots 7 and then turning the said ring 6 in the proper direction tocause the lugs c to travel along the said slot f whereby. the flange ofa globe resting upon the said ring will be pressed against the head ofthe cap or a packing ring thereon. As has been above explained, theslots f are made of such length that a considerable degree of adjustmentis obtained which is sufficient to enable glass globes or wellglasseshaving flanges of varying thickness quired the ring 5 simply serves forsupporting the globe in the cap or dome. it is a screw-pin which servesas a locking means for preventing the unauthorized removal of the globeor globe and guard, the said pin 72. passing through a screw threadedhole z in the rim 6 of the cap or dome and having a point j which can becaused to press against the outer face of the ring 6 when the latter hasbeen adjusted in position in the rim. This locking pin is furnished witha head is of triangular shape which is inclosed in a socket Z upon theouter periphery of the rim 6. The outer end of the said socket Z isfurnished with a cap m provided with a triangular opening a, seen inFig. 1, for preventing the introduction of anything other than atriangularly shaped key which fits the screw head into the socket forunlocking the ring.

In Figs. 4 and 5 we have illustrated a V modified form of auxiliarylocking means.

In this construction the ring b of the holder is furnished with teeth 0on its'outer periphery and in conjunction with the said toothedperiphery there is provided a toothed disk p which is eccentricallykeyed on, or formed integral with, the pin g. This pin g has atriangular shank which extends into a socket s on the underside of therim 6 this socket 8 being similar to the socket Z described withreference to Figs. 1 to 3. With this construction the toothed eccentricp can, by means of a key, inserted into the socket s so as to engage theshank r of the pivot pin 9, be turned out of engagement with the toothedperiphery 0 of the ring 6 thus permitting the latter to be adjusted inthe rim 6 when the ring I) is adjusted, the toothed eccentric p can beturned so that its teeth can engage with the teeth 0 of the ring 6 andthus lock the latter in position, the arrangement being such that anyattempt to turn the ring b so as to remove it from the rim (3 tends totighten the grip of the eccentric p upon the ring. To prevent theinsertion of a wire or like device between the teeth of the ring b andthe inner periphery of the rim o so as to disengage the toothedeccentric p from the ring 72 the latter may be provided with anoutwardly extending flange on the lower surface which extends beneaththe lower face of the flange 6 If desired the teeth 0 can be dispensedwith, the teeth of the eccentric engaging with the periphery of the ringCopies of this patent may be obtained for five cents each, by addressingthe which may be left rough as it is taken from the mold.

As will be understood the auxiliary means of looking as above describedare given by way of example only, as any other convenient means for thepurpose may be made use of.

Claims:

1. An electric light fitting or bracket comprising a cap provided withan annular rim having spiral grooves formedin its inner surface andextending from the lower edge of said rim to within a short distance ofthe cap, a supporting ring for clamping the annular rim of a well-glassagainst said cap, mounted in said rim and provided on its periphery withlugs which engage said grooves, and means for locking said ring in saidrim.

2. An electric light fitting or bracket comprising a cap provided withan annular rim having spiral grooves formed in its inner surface, asupporting ring for clamping the annular rim of a well-glass againstsaid cap, mounted in said rim and provided with lugs which engage saidgrooves, teeth formed in the periphery of said ring, and a toothedeccentric adapted to engage the teeth of said ring for locking the ringin the rim,

EDWIN ROBERT HOUGH. LAURENCE HARRISON. Witnesses:

JOHN E. Bousrrnnn, A. ALBUTT.

Commissioner of Patents,

Washington, D. G."

